Alvão / Marão
IUCN Not ReportedSite of Community Importance (Habitats Directive) · 2008
588 km²
Commune · PRT
Valdigem
Portugal
CsaTemperate, dry summer, hot summer(53 %)
Species observed
751
Observations
9 872
Area
10,9km²
Ecological tissue
Sample of 39 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique
Indicateurs du tissu écologique
Tissu écologique de Valdigem : 28 espèces reliées par 102 interactions GloBI sur 6 types (connectance 13.8%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
39
Interactions affichées
102
Connectance
0.138
Patrimoniales
0
Plus dense que (national)0 %(top 100%)
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Species present
751 distinct species · 9 872 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
14,0°C
Annual rain
760mm
Warmest m°
27,8°C
Coldest m°
2,6°C
Elevation: 323 m on average (min 82 m, max 625 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
14,0°C
Annual rain
760mm
Warmest month
27,8°C
Coldest month
2,6°C
Mean alt.
323m
Min
82m
Max
625m
Std. dev.
116m
Köppen-Geiger (dominant)
CsaTemperate, dry summer, hot summer(53 %)Temperate
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
5,6
Org. C
35,9g/kg
Clay
15,3%
Sand
48,8%
Silt
35,9%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: mtGLiMaggregated to Lamego
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
5,6
Org. C
58,0g/kg
Clay
14,6%
Sand
48,7%
Silt
36,6%
5–15 cm
pH H₂O
5,6
Org. C
24,1g/kg
Clay
13,5%
Sand
49,4%
Silt
37,2%
15–30 cm
pH H₂O
5,6
Org. C
25,6g/kg
Clay
17,7%
Sand
48,4%
Silt
33,9%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest15.6%
Crops3.6%
Built-up1.1%
Bare soil8.1%
Other (grassland, water…)71.6%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology4 basins · 2 lakes · 4 rivers
Hydrology metrics for this exact territory
Stream length here
4,9km
Lake surface here
0,10km²
Basins crossed
4
Max stream order
7
Max drainage
91 973km²
Discharge in basins
374,7m³/s
Mean precip.
1 280mm/an
Mean T°
12,4°C
Moisture idx
0,20
Max snow
3%
Mean runoff
604mm/an
Mean elev. (basins)
699m
Watersheds crossing here
Lakes (2, top by area)
Rivers / streams (4, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
2,7nW
Built-up
108,6%
Pesticides
38,4kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas1
IUCN Not Reported · 1
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN